1. Implement the following method:

/** * Calculates an array of percentages from an array of values. * * Specifically, this method calculates the total of all of the * elements in the given array and divides each element into the * total to determine the percentages. * * @param values The array of non-negative values * @return The array of percentages. */ public static double[] toPercentages(double[] values) { }

2. Desk check the toPercentages() method. What conditions will cause it to fail?

3. What exception will be thrown when the following application program is executed with the method? What line will cause the exception to be thrown? Why? Include a screenshot of your code and the output pane.

private static double[] sales; public static void main(String[] args) { double[] percentages; percentages = toPercentages(sales); }

4. Modify the declaration of the toPercentages() method so that it specifies the NullPointerException. What is the declaration now?

5. Modify the first for loop in the toPercentages() method so that it throws an IllegalArgumentException if any element of values is negative. What statements are in the body of the loop now?

6. Why do you not need to include an else clause in the if statement?

7. What will happen if more than one element is negative? In particular, how many exceptions will be thrown? Include a screenshot of your code and the output pane.

8. Modify the declaration of the toPercentages() method so that it now also includes IllegalArgumentException. What is the declaration now?

9. Add a statement after the first for loop, but before the statement that allocates memory for result, that throws an IllegalArgumentException if total is 0. What statement did you add? Include a screenshot of your code and the output pane.

10. The toPercentages(double[]) method is now implemented as follows.

public static double[] toPercentages(double[] values) throws IllegalArgumentException, NullPointerException { double total; double[] result; // Calculate the total total = 0; for (int i=0; i 
Why is the statement that allocates memory for result where it is rather than earlier (for example right after the declaration or even in the declaration statement)?